func readInts() -> [Int] { return readLine()!.split(separator: " ").map { Int($0)! } } func main() { let n = Int(readLine()!)! let As: [Int] = readInts() var k: Int = -1 var answer = 0 for i in 0.. k { k = As[i] answer += 1 } } print(As.count - answer) } main()